Test C: Warning Indicator On With Engine Running, System Is Charging
- Connect NGS tester. Turn ignition on and perform PCM self-test. If any Diagnostic Trouble Code (DTC)s are retrieved, see POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX table. If no DTCs are retrieved, go to next step.
- Turn ignition off. Disconnect NGS tester. Start engine. With engine running and all accessories turned off, measure voltage between battery terminals while varying engine speed. If voltage is greater than 15 volts, perform TEST B: SYSTEM OVERCHARGES . If voltage is less than 15 volts, go to next step.
- Turn ignition off. Disconnect generator 3-pin connector. Turn ignition on. Measure voltage of Red wire at generator 3-pin connector. If battery voltage is present, go to next step. If voltage is not present, repair open or short in Red wire. See WIRING DIAGRAMS . Retest system operation.
- Turn ignition off. Disconnect PCM connector C175c. Turn ignition on and observe warning indicator. If warning indicator is illuminated, repair short to ground in Gray/Red wire between generator and PCM. See WIRING DIAGRAMS . If warning indicator is not illuminated, go to next step.
- Turn ignition off. Reconnect PCM connector C175c. Disconnect generator 3-pin connector. Check generator output. See GENERATOR LOAD TEST under ON-VEHICLE TESTING. If generator tests okay, go to next step. If generator does not test okay, replace generator. See GENERATOR under REMOVAL & INSTALLATION.
- Disconnect PCM connector C175c. Inspect connector for pushed out pins, corrosion or bent terminals. Repair as necessary. If connector is okay, reconnect and retest system operation. If fault is still present, replace PCM. Clear DTCs and repeat PCM self-test. If fault is still not present, system is operating correctly at this time.